Throgmorton House, Flat 5, 27 Elphinstone Road, Southsea, PO5 3HP

Throgmorton House is a semi-detached house in Southsea (PO5 3HP). It has a recorded floor area of 45 m² (around 484 sq ft) and construction records dating it to before 1900. At 45 m² this is the 2nd smallest of 7 units on EPC record in Throgmorton House, where floor areas span 33–122 m². The building's EPC ratings span D to C, with this unit at the bottom. The latest certificate (March 2013) shows a D (score 61), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since March 2009. Between certificates, lighting went from Very Poor to Average; while wall efficiency dropped from Poor to Very Poor. The recommended improvements would push it to C (score 76). The latest certificate is from March 2013, so improvements made since then won't be reflected.

Held since June 2007 — that's 19 years off the open market, well above the local norm. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. Today's modelled estimate of £142,000 is 42% above the 2007 sale price. On a £-per-square-foot basis, the last sale (£206/sq ft) was about 22.8% above the typical sold price in the postcode. At 45 m² it's 18.2% smaller than the typical home in the postcode (55 m² median across 39 EPCs).